diff options
Diffstat (limited to 'nuttx/arch/arm/src/imx/imx_cspi.h')
| -rwxr-xr-x | nuttx/arch/arm/src/imx/imx_cspi.h | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/nuttx/arch/arm/src/imx/imx_cspi.h b/nuttx/arch/arm/src/imx/imx_cspi.h index e0d97f2d4..421b6a4e3 100755 --- a/nuttx/arch/arm/src/imx/imx_cspi.h +++ b/nuttx/arch/arm/src/imx/imx_cspi.h @@ -1,7 +1,7 @@ /************************************************************************************ * arch/arm/src/imx/imx_cspi.h * - * Copyright (C) 2009 Gregory Nutt. All rights reserved. + * Copyright (C) 2009-2010 Gregory Nutt. All rights reserved. * Author: Gregory Nutt <spudmonkey@racsa.co.cr> * * Redistribution and use in source and binary forms, with or without @@ -176,23 +176,30 @@ extern "C" { * Public Functions ************************************************************************************/ -/* The external functions, imx_spiselect and imx_spistatus must be provided by - * board-specific logic. The are implementations of the select and status methods - * SPI interface defined by struct spi_ops_s (see include/nuttx/spi.h). All other - * methods (including up_spiinitialize()) are provided by common logic. To use this - * common SPI logic on your board: +/* The external functions, imx_spiselect, imx_spistatus, and imx_cmddaa must be + * provided by board-specific logic. These are implementations of the select and + * status methods of the SPI interface defined by struct spi_ops_s (see + * include/nuttx/spi.h). All other methods (including up_spiinitialize()) are + * provided by common logic. To use this common SPI logic on your board: * * 1. Provide imx_spiselect() and imx_spistatus() functions in your board-specific * logic. This function will perform chip selection and status operations using * GPIOs in the way your board is configured. - * 2. Add a call to up_spiinitialize() in your low level initialization logic - * 3. The handle returned by up_spiinitialize() may then be used to bind the + * 2. If CONFIG_SPI_CMDDATA is defined in your NuttX configuration, provide the + * imx_spicmddata() function in your board-specific logic. This function will + * perform cmd/data selection operations using GPIOs in the way your board is + * configured. + * 3. Add a call to up_spiinitialize() in your low level initialization logic + * 4. The handle returned by up_spiinitialize() may then be used to bind the * SPI driver to higher level logic (e.g., calling mmcsd_spislotinitialize(), * for example, will bind the SPI driver to the SPI MMC/SD driver). */ EXTERN void imx_spiselect(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected); EXTERN uint8_t imx_spistatus(FAR struct spi_dev_s *dev, enum spi_dev_e devid); +#ifdef CONFIG_SPI_CMDDATA +EXTERN int imx_spicmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd); +#endif #undef EXTERN #ifdef __cplusplus |